Nokia Certified Network Associate (NCNA) — Question 59

Which of the following is an important advantage of protocol layering? (Choose two)

Answer options

• A. Controls distribution of IP addresses.
• B. Simplifies protocol functionality.
• C. Isolates changes in lower layers from upper layers.
• D. Increases protocol operational efficiencies.
• E. Layering adds to the fragmentation of the data

Correct answer: C, D

Explanation

The correct answers are C and D. C is correct because protocol layering allows changes in the lower layers to occur without affecting the upper layers, providing flexibility. D is also correct as layering can improve operational efficiencies by organizing functions and reducing redundancy, while A, B, and E do not accurately reflect the primary advantages of protocol layering.